Add timestamp option

camera/camera_linux.go

@@ -6,10 +6,14 @@ package camera
 import (
 	"fmt"
 	"image"
+	"image/color"
+	"image/draw"
+	"time"
 
 	"github.com/disintegration/imaging"
 	"github.com/korandiz/v4l"
 	"github.com/korandiz/v4l/fmt/mjpeg"
+	"github.com/pbnjay/pixfont"
 
 	im "github.com/gen2brain/cam2ip/image"
 )
@@ -82,10 +86,6 @@ func (c *Camera) Read() (img image.Image, err error) {
 		return
 	}
 
-	if c.opts.Rotate == 0 {
-		return
-	}
-
 	switch c.opts.Rotate {
 	case 90:
 		img = imaging.Rotate90(img)
@@ -95,6 +95,17 @@ func (c *Camera) Read() (img image.Image, err error) {
 		img = imaging.Rotate270(img)
 	}
 
+	if c.opts.Timestamp {
+		dimg, ok := img.(draw.Image)
+		if !ok {
+			err = fmt.Errorf("camera: %T is not a drawable image type", img)
+			return
+		}
+
+		pixfont.DrawString(dimg, 10, 10, time.Now().Format("2006-01-02 15:04:05"), color.White)
+		img = dimg
+	}
+
 	return
 }